/*
 * Copyright 2012 Netflix, Inc.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.netflix.exhibitor.core.index;

import com.google.common.collect.ImmutableList;
import java.io.File;
import java.io.FileFilter;
import java.util.List;

public class IndexList
{
    private final List<File>        indexes;

    public IndexList(File directory)
    {
        File[] filtered = directory.listFiles
        (
            new FileFilter()
            {
                @Override
                public boolean accept(File f)
                {
                    if ( IndexMetaData.isValid(f) )
                    {
                        File    metaDataFile = IndexMetaData.getMetaDataFile(f);
                        if ( metaDataFile.exists() )
                        {
                            return true;
                        }
                    }
                    return false;
                }
            }
        );
        indexes = (filtered != null) ? ImmutableList.copyOf(filtered) : ImmutableList.<File>of();
    }

    public List<File> getIndexes()
    {
        return indexes;
    }
}
